Soudal Fix ALL High Tack INVISIBLE

Health & Safety Recommendations

Read the packaging label and Safety Data Sheet before use, and follow normal site hygiene at all times. Keep the work area well ventilated during application and throughout curing, particularly in enclosed rooms or where several joints or bonded items are being completed in one session. Wear suitable gloves and eye protection, avoid prolonged skin contact, and clean off uncured product promptly if accidental contact occurs. If material gets into the eyes, rinse immediately with plenty of clean water and seek medical advice if irritation persists.

Because Fix ALL High Tack Invisible is designed for clear, visible bonding and sealing work, careful handling matters just as much as basic safety. Keep surrounding finished surfaces protected where appearance is important, and avoid unnecessary smearing onto trims, panels, sanitary ware, glass, or decorative coatings. Maintain a tidy work area, especially when tooling with soapy solution, as residues on polished floors or glossy surfaces can create slip risks and extra clean-up.

Substrate Suitability

Fix ALL High Tack Invisible is a clear SMX Hybrid Polymer adhesive sealant designed for high tack bonding on many common construction materials. It has good adhesion on usual building substrates, lacquered wood, metals, plastics, and PVC, which makes it useful for transparent bonding and neat sealing details where both appearance and strength are important. It can be applied to surfaces that are dry or slightly moist, which is helpful in refurbishment and general building work where perfectly dry conditions are not always available.

It is not suitable for PE, PP, PTFE (Teflon®), bituminous substrates, copper, or copper containing materials such as bronze and brass. Bonding plastics such as PMMA, for example Plexi® glass, or polycarbonate, for example Makrolon® or Lexan®, in stress loaded applications can lead to stress cracking and crazing, so Fix ALL High Tack Invisible is not recommended in those situations. Adhesion and compatibility can vary between plastic manufacturers and surface finishes, so a preliminary adhesion and compatibility test should be carried out on every unfamiliar or critical surface before full application.

Surface Preparation

Correct preparation is essential for a clean transparent finish and a reliable long term bond. The surface must be rigid, clean, and free from dust, grease, oil, release agents, loose coatings, and contamination that could interfere with adhesion. The product can tolerate slightly moist surfaces, but visible water, condensation build-up, and standing moisture should be removed before application so the adhesive can wet the surface properly and cure consistently.

Porous surfaces in water loaded applications should be primed with Soudal Primer 150. Non-porous surfaces should be prepared with Soudal Cleaner & Degreaser in line with the technical data guidance, and for optimum adhesion the use of Surface Activator is recommended where appropriate. Plastics often carry protective films, processing aids, or mould release agents from manufacture and transport, so these must be removed fully before bonding or sealing. On visible work, proper cleaning is especially important because any contamination can reduce clarity at the bond line and increase the risk of edge lift or localised failure.

Application Method

Apply Fix ALL High Tack Invisible with a caulking gun, laying down a controlled, even bead that suits the joint size or bonding area. Because this product combines high initial tack with a clear final appearance, the bead should be applied carefully and consistently to avoid air pockets, excessive squeeze-out, or visible smearing across the face of the material. If a neat joint edge is required, masking tape can be used to protect adjacent surfaces and help maintain a sharper finish.

For bonding work, apply the product as a continuous or controlled bead pattern to one substrate, then bring the parts together and press firmly into position so the high tack properties can activate properly. For sealing work, fill the joint evenly and tool before skinning begins. Skin formation occurs at around 10 minutes under normal conditions, so tooling should be completed promptly. Finish with a lightly soapy solution before skinning, but keep the solution away from the actual adhesion faces as much as possible so it does not interfere with bond quality.

Because Fix ALL High Tack Invisible is intended for a transparent, visually discreet finish, take particular care not to smear the visible face of the material during application. Clear products show handling marks and residue more readily than opaque adhesives, so clean working practice is essential from the start.

Coverage

Coverage depends on bead size, bead pattern, substrate flatness, and whether the product is being used mainly as an adhesive or as a sealing detail. Narrow, controlled bonding beads will naturally cover more linear metres than wider sealing joints or heavier beads used to bridge uneven surfaces. On rough or irregular backgrounds, slightly higher product use should be expected to ensure full contact and a dependable bond.

For practical estimating, calculate coverage according to the actual bead size and total run length required on the job, then allow a sensible margin for nozzle trimming, start-stop losses, tooling, and cleaning. Where the finished appearance is especially important, it is wise to allow a little extra material so the work can be carried out cleanly without forcing overly thin beads.

Curing Time

Fix ALL High Tack Invisible cures by moisture curing and forms a skin in approximately 10 minutes under typical conditions. Cure speed is around 3mm/24h, although actual curing will depend on temperature, humidity, bead thickness, ventilation, and the nature of the substrate. Thicker beads and less absorbent surfaces will extend cure time, while good airflow and moderate ambient conditions generally support more consistent curing.

Once cured, the product remains permanently elastic and is designed to accommodate movement up to ±20%, which is useful where bonded assemblies are exposed to minor thermal movement or vibration. The cured material has a Shore A hardness of approximately 55 ± 5, with an elasticity modulus of around 1.90N/mm² and elongation at break of around 250%, giving a balance of grip, resilience, and flexibility suitable for visible bonding and sealing work.

Cleaning

Clean uncured Fix ALL High Tack Invisible immediately using Swipex Cleaning Wipes. Prompt cleaning is particularly important with clear products, because smears and film residue can remain visible on glossy, coated, or transparent surfaces even when the main bead looks neat. Keep the nozzle, gun, and surrounding surfaces clean throughout the application process to reduce the risk of dragging material across the visible face of the substrate.

Once cured, the product can only be removed mechanically. Mechanical removal should be done carefully, especially on decorative finishes, coated metals, plastics, and other visible surfaces where scraping could damage the finish more than the adhesive itself. In most cases, prevention through careful application is much better than trying to correct cured residue afterwards.

Limitations

Fix ALL High Tack Invisible is not suitable for PE, PP, PTFE (Teflon®), bituminous substrates, copper, or copper containing materials such as bronze and brass. It cannot be used as a glazing sealant, use Silirub 2 or Silirub LMN instead. It is not suitable for bonding aquariums, use Silirub AQ. It must not be used in applications where continuous water immersion is possible.

Do not use it on natural stones such as marble or granite where staining risk is unacceptable. It also should not be used on PMMA or polycarbonate in stress loaded applications, as crazing and stress cracking can occur. Contact with bitumen, tar, or plasticiser releasing materials such as EPDM, neoprene, and butyl should be avoided, as this can lead to discoloration and loss of adhesion. When different reactive joint sealants are used in the same area, the first sealant must be fully hardened before the next one is applied.

Although Fix ALL High Tack Invisible has good UV resistance, discoloration can still occur under extreme conditions or after prolonged UV exposure. High temperatures, chemical exposure, and UV radiation may all affect appearance over time, which is especially relevant on clear or visible bond lines.

Other Information

Fix ALL High Tack Invisible may be overpainted with water based paints, but due to the wide range of paints and varnishes available, a compatibility test is strongly recommended before full decoration. Alkyd resin based paints may show increased drying times over the cured adhesive, so additional time should be allowed if these coatings are used.

The product is very low emission and suited to both internal and external applications where a clear high tack bond is required. For the best results, plan the application carefully, keep the bond line controlled, and complete positioning and finishing before skinning begins. Because clarity is one of the product’s main advantages, attention to detail during cleaning, tooling, and handling is especially important to achieve the intended invisible finish.

Q) What is Soudal Fix ALL High Tack Invisible?

A) Soudal Fix ALL High Tack Invisible is a premium crystal clear adhesive sealant based on advanced SMX Polymer technology, designed for jobs where you need both strong immediate hold and a discreet transparent finish. It is a neutral curing, one-component product that combines the gripping power of a high tack construction adhesive with the flexibility of an elastic sealant. That makes it particularly useful where a white, grey or opaque adhesive line would spoil the finished appearance. Once cured, Soudal Fix ALL High Tack Invisible remains elastic rather than turning brittle, so it is suited to installations that need long-term movement tolerance as well as strong bonding performance across common interior and exterior building applications.

Q) What is Soudal Fix ALL High Tack Invisible used for?

A) Soudal Fix ALL High Tack Invisible is used for clear, durable bonding and sealing where appearance matters just as much as strength. It is well suited to visible trims, decorative pieces, panels, profiles and mixed-material details where a conventional opaque adhesive would stand out and distract from the finish. Because it also offers very high initial tack, it is useful where the component needs to stay in position quickly after placement. That makes it practical for interior fit-out work, external detailing, heavy-duty visible bonding, and selected sanitary-style applications where a clean transparent joint is preferred. Its strength, flexibility and low-visibility finish make it especially attractive on premium, design-led work.

Q) Why would someone choose Soudal Fix ALL High Tack Invisible instead of a standard clear sealant?

A) The main reason is that Soudal Fix ALL High Tack Invisible is not just a decorative clear sealant with light bonding ability. It is a serious high tack adhesive sealant designed to deliver a strong transparent bond with a final bond strength of up to 320kg/10cm². Many standard clear sealants look tidy but are not intended for demanding fixing work, especially where quick holding power matters. This product combines very high initial grab with a crystal clear final appearance, so it can support more substantial items while still keeping the bond line discreet. That makes it valuable on visible construction details where both clean presentation and real holding power are needed.

Q) Will Soudal Fix ALL High Tack Invisible dry properly clear?

A) Soudal Fix ALL High Tack Invisible is designed to cure to a clear, visually discreet bond line, which is one of its main advantages. It is intended for applications where the adhesive should not draw attention to itself, such as decorative trims, clear details and visible joins between finished materials. To get the best visual result, the application needs to be clean and controlled. Air pockets, over-smearing, dirty surfaces and poor tooling will make any clear product look less neat, even if the adhesive itself is transparent. In other words, Soudal Fix ALL High Tack Invisible can give an excellent clear finish, but good preparation and tidy workmanship are essential if the joint is going to look truly professional.

Q) What materials will Soudal Fix ALL High Tack Invisible bond to?

A) Soudal Fix ALL High Tack Invisible is intended for use on most common porous and non-porous construction materials, which is why it is so useful for mixed-material installations. It has good adhesion on usual building substrates, lacquered wood, many metals, many plastics and PVC, and it can also be used on suitable visible surfaces where a clear bond line is important. It is particularly practical when different finished materials meet and the installer wants both strong adhesion and a discreet appearance. Even with that broad compatibility, surface formulations vary between manufacturers, especially with coated finishes and plastics, so a small adhesion and compatibility test is always sensible before starting a full installation.

Q) Can Soudal Fix ALL High Tack Invisible be used indoors and outdoors?

A) Yes, Soudal Fix ALL High Tack Invisible is suitable for both interior and exterior use, which adds a lot to its practicality. Indoors, its virtually odourless character and very low emission profile make it more comfortable to use in occupied or enclosed spaces. Outdoors, it offers good weather resistance and good UV resistance, helping it maintain performance where sunlight, rain and temperature changes are part of normal service conditions. This makes it useful for everything from interior decorative bonding to external visible repairs and detailing on compatible substrates. Its combination of transparency, strong initial grab and durable cured flexibility means it can work well in both sheltered and exposed environments when used correctly.

Q) Can Soudal Fix ALL High Tack Invisible be applied to slightly damp or humid surfaces?

A) Yes, one of the practical advantages of Soudal Fix ALL High Tack Invisible is that it can be applied to many slightly wet, damp or humid surfaces, which is especially useful on live building sites and refurbishment jobs. That does not mean it should be applied onto standing water, heavy condensation or dirty, unstable surfaces, because poor preparation will still weaken the bond. What it does mean is that you do not always need perfectly dry conditions to make progress. This can save time where minor surface moisture is unavoidable. Even so, for the strongest and cleanest result with Soudal Fix ALL High Tack Invisible, the substrate should still be sound, clean and as dry as reasonably possible.

Q) Is Soudal Fix ALL High Tack Invisible suitable for visible decorative bonding?

A) Yes, this is one of the main reasons to choose Soudal Fix ALL High Tack Invisible. It is specifically designed for situations where the bond line needs to remain visually discreet while still delivering very strong holding power. That makes it ideal for decorative trims, fitted panels, profiles, finished surfaces and similar visible details where an opaque adhesive would spoil the final appearance. Because the product also offers high initial tack, it helps components stay where they are placed quickly, which is useful when accuracy matters. On decorative work, the installer benefits from both appearance and practicality. It is not just about drying clear, it is about giving a clear finish without sacrificing the strength needed for real site use.

Q) Is Soudal Fix ALL High Tack Invisible strong enough for heavy-duty bonding?

A) Yes, Soudal Fix ALL High Tack Invisible is designed as a genuine high tack bonding product, not just a light-duty clear adhesive. It combines very high initial grab with a final bond strength of up to 320kg/10cm², which gives it real heavy-duty capability on suitable substrates. That makes it appropriate for demanding visible bonding jobs where the item needs to hold quickly and stay securely fixed over time. Its strength is particularly useful on panels, trims, profiles and other construction components where a transparent finish is preferred but a weak adhesive would not be acceptable. The important point is that Soudal Fix ALL High Tack Invisible is built to deliver both discretion and performance, not one at the expense of the other.

Q) Does Soudal Fix ALL High Tack Invisible stay flexible after curing?

A) Yes, Soudal Fix ALL High Tack Invisible remains elastic after curing, which is a key part of its long-term performance. A rigid adhesive can be very strong at first but may crack, debond or fail at the edges if the bonded materials move differently over time. This product is designed to avoid that by maintaining useful flexibility once cured. It can accommodate movement up to ±20%, which helps where there is minor thermal expansion, vibration or day-to-day building movement. That flexibility is especially important on mixed-material details where glass, timber, metal, plastics or coated surfaces can expand and contract at different rates. The bond stays strong, but it is not brittle.

Q) Is Soudal Fix ALL High Tack Invisible suitable for natural stone?

A) Soudal Fix ALL High Tack Invisible is presented as suitable for clear, durable bonding on porous natural stone and is particularly useful where appearance matters. That makes it attractive for visible stone details where a traditional opaque adhesive line would be undesirable. Its clear finish can help preserve a cleaner overall look, while the strong bond and elastic cure support long-term performance. Because natural stone varies widely in porosity, finish and sensitivity, a compatibility test is still a wise precaution before full use, especially on high-value materials or very visible installations. In practice, Soudal Fix ALL High Tack Invisible is best seen as a stone bonding product for neat visual work, rather than a universal answer to every stone sealing task.

Q) How should surfaces be prepared before using Soudal Fix ALL High Tack Invisible?

A) Proper preparation is essential if you want both a strong bond and a clean transparent finish. Surfaces should be rigid, clean and free from dust, grease, oil, release agents, loose coatings and any contamination that could interfere with adhesion or make the clear bond line look untidy. Slight surface moisture can be tolerated, but visible water and heavy condensation should be removed. For porous surfaces in water-loaded situations, use Soudal Primer 150 where required. For non-porous surfaces, prepare with Soudal Cleaner & Degreaser in line with the technical guidance. Plastics deserve particular care because protective films and manufacturing residues can easily ruin adhesion. With Soudal Fix ALL High Tack Invisible, clean preparation is especially important because the finish remains visible.

Q) How do you apply Soudal Fix ALL High Tack Invisible properly?

A) Apply Soudal Fix ALL High Tack Invisible with a caulking gun using a controlled, even bead sized to suit the joint or bonding detail. For bonding, run the product onto one substrate and press the parts firmly together so the high tack properties can engage properly. For sealing, fill the joint evenly and make sure the adhesive sealant wets both sides of the joint fully. Because this is a clear product, neatness matters more than with opaque adhesives, so avoid over-application and excessive squeeze-out. Masking tape can help where a sharper finish is needed. Tool the bead promptly, because Soudal Fix ALL High Tack Invisible starts to skin relatively quickly and becomes harder to dress neatly once that happens.

Q) How much working time do you get with Soudal Fix ALL High Tack Invisible?

A) Soudal Fix ALL High Tack Invisible offers a practical but limited working window. Under normal conditions, skin formation begins at around 10 minutes, so application, positioning and any tooling should be completed promptly. That gives enough time for careful work, but not so much that the job can be left half-finished while the installer decides what to do next. For that reason, it is best to prepare everything first, including dry-fitting the parts, planning the bead layout and protecting nearby surfaces if appearance matters. Clear products reward tidy working habits. If you start with a clean, organised setup, Soudal Fix ALL High Tack Invisible gives a very workable balance between good handling time and efficient early stability.

Q) How long does Soudal Fix ALL High Tack Invisible take to cure?

A) Soudal Fix ALL High Tack Invisible cures by moisture reaction and typically skins in around 10 minutes, with a curing speed of roughly 3mm per 24 hours. The actual cure time will vary depending on bead thickness, temperature, humidity, airflow and the nature of the substrate. Thicker beads and less absorbent materials will slow curing, while moderate warmth and decent ventilation tend to support more even progress. As with most hybrid adhesive sealants, the surface may appear stable well before the bead has fully cured through its depth. That means bonded parts should not be stressed too early. For the best results, allow Soudal Fix ALL High Tack Invisible enough curing time to suit the real site conditions rather than assuming every application cures at maximum speed.

Q) Can Soudal Fix ALL High Tack Invisible be painted?

A) Yes, Soudal Fix ALL High Tack Invisible can be painted with many water-based paint systems once cured, which is useful when the surrounding detail needs to blend into a finished decorative scheme. That said, a compatibility test is always recommended because paints and varnishes vary widely, and not every coating will behave in the same way over a cured hybrid polymer. Water-based systems are generally the safest option, while some alkyd resin paints may dry more slowly over the adhesive. It is also worth remembering that some users choose Soudal Fix ALL High Tack Invisible specifically because they want a clear bond line, so painting is an option rather than a requirement. Let it cure properly first for the most reliable result.

Q) Does Soudal Fix ALL High Tack Invisible resist weather and UV?

A) Yes, Soudal Fix ALL High Tack Invisible offers good weather resistance and good UV resistance, which supports its use in both interior and exterior applications. This helps the cured adhesive line remain serviceable where it is exposed to rain, seasonal temperature change and normal outdoor ageing. That is particularly important because the product is often used on visible details where appearance and durability both matter. Its elastic cured state also helps it handle the movement that often comes with weather exposure, especially where different materials expand and contract at different rates. While any clear product can show some change under extreme long-term exposure, Soudal Fix ALL High Tack Invisible is designed to deliver dependable outdoor performance on suitable substrates.

Q) Can Soudal Fix ALL High Tack Invisible be used in bathrooms and kitchens?

A) Yes, Soudal Fix ALL High Tack Invisible can be useful in bathrooms and kitchens where a clear, flexible bond or seal is preferred for appearance reasons. It is suitable for sanitary-style sealing and bonding details where a visually discreet finish is important, such as around finished surfaces and fitted elements. Its virtually odourless application also makes it more comfortable to use indoors. As with any product in wet or humid environments, correct preparation and sensible detailing matter just as much as the product itself. Keep surfaces clean, allow proper curing time and avoid early water exposure while the bead is still fresh. Used correctly, Soudal Fix ALL High Tack Invisible can provide a neat, durable and low-visibility result in finished interior spaces.

Q) How do you clean up Soudal Fix ALL High Tack Invisible?

A) Clean-up should be done immediately while the product is still uncured. Use Swipex Cleaning Wipes to remove fresh Soudal Fix ALL High Tack Invisible from tools and non-porous surfaces before it begins to skin. This is particularly important with a clear adhesive, because even small smears can remain visible on glass, glossy trims or coated surfaces once the light catches them. Keep the nozzle and tools clean during use so partially cured residue is not dragged into the visible bead. Once cured, the product can only be removed mechanically, which increases the risk of damaging decorative finishes. In short, the best approach with Soudal Fix ALL High Tack Invisible is clean working from the start rather than relying on later correction.

Q) What are the main limitations of Soudal Fix ALL High Tack Invisible?

A) Soudal Fix ALL High Tack Invisible is not suitable for PE, PP, PTFE, bituminous substrates, copper, bronze or brass. It should not be used on PMMA or polycarbonate in stress-loaded situations because crazing and stress cracking can occur. It is also not suitable as a glazing sealant, for aquarium bonding, or for continuous water immersion. Contact with bitumen, tar and plasticiser-releasing materials such as EPDM, neoprene and butyl should be avoided because these can lead to discolouration and adhesion loss. Although it offers good UV resistance, appearance can still be affected by extreme conditions over time. The safest approach is to treat Soudal Fix ALL High Tack Invisible as a specialist clear high-tack adhesive sealant and use it within those intended limits.

Q) What are the best tips for getting the best results with Soudal Fix ALL High Tack Invisible?

A) The best results come from treating Soudal Fix ALL High Tack Invisible as both a structural-style adhesive and a visible finish product. Prepare the surfaces thoroughly, dry-fit the parts first and plan the bead size before opening the tube. Apply carefully and avoid unnecessary squeeze-out, because clear products show poor workmanship more readily than opaque ones. Use masking tape where a crisp line matters, and tool before skinning begins. If finishing solution is used, keep it away from the actual adhesion faces as much as possible. Allow proper curing time before loading or painting. Most importantly, do a small adhesion and appearance test on unfamiliar materials. With Soudal Fix ALL High Tack Invisible, neat preparation is just as important as bond strength.

Technical Data Sheet

Fix-All Product Selector

Safety Data Sheet