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Clear Sealant

Formoa® Crystal

Formoa Crystal is a single-component MS Polymer sealant. It is designed for sealing applications requiring a crystal clear sealant with low viscosity and high UV stability.

Crystal Clear Sealant

Reduced viscosity

Excellent UV stability


290ml Cartridge

600ml Foil Pack


Formoa Crystal is engineered for pristine, transparent sealing applications. Its inherent UV stability ensures its clarity remains uncompromised, even under challenging environmental conditions. With a reduced viscosity, it is easy to use and tool up. Formoa Crystal adheres to metals, plastics, composites, and wood without the need for a primer. While highly effective, it also remains safe, although certain users might exhibit an allergic response.
Sizes available
290ml Cartridge
600ml Foil Pack
Also bulk options available
Colours available
Crystal clear
(accent colours available on request)


Internal and external sealing applications:
Whether you are sealing the bathroom or the exterior of a luxury yacht, Formoa Crystal will acheive a high quality finish that remains crystal clear even when exposed to harsh conditions.
Clear sealing for industrial manufacturers:
Formoa Crystal is ideal for industrial manufacturers who need a high quality sealant to remain crystal clear. Typical industries such as RV, Bus and Coach, and Marine are common users of Formoa Crystal due to its durability and ability to remain crystal clear.

Key features

Crystal clear sealant
Low viscosity = straightforward application
High UV performance
Primerless adhesion
Silicone and solvent-free
Very easy to tool and finish
Minimal health and safety considerations
Resistance to many chemicals
No staining of porous materials such a natural stone, granite, marble, etc

How to use

Application Temperature:
Between 1℃ and 30℃
(Lower temperatures will increase thickness)
Surface preparation:
Clean surface to remove grease and contamination. Then apply Formoa surface activator prior to bonding and allow 10 minutes to flash off. General sealing will not require the use of surface activator.
Method will depend on foil pack or cartridge use. If unsure on the correct method of application, follow your company's SOP or watch the 'How-To' video in the media section below.
Use an approved soapy solution before the skin over time.


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No, providing the user follows the correct instructions, Formoa Crystal will not become yellow even when exposed to UV and harsh conditions. There may be certain chemicals that cause the sealant to become yellow.

We aren't talking about the blue cartridge, but the blue tint is nothing to be worried about. The UV blockers incorporated into the product to help retain its clarity long-term are the cause of the blue tint. These will subside and it will become Crystal Clear.

Yes, once Formoa Crystal is fully cured, it can be painted over. As there is no silicone based ingredients in Formoa Crystal , it will not cause paint bubbling or cracking.

Yes, Formoa Crystal doesn't contain any harmful chemicals. It may cause an allergic reation in some users. However, this is rare. Formoa Crystal also has ISEGA Food Safety Approval so can be used in any applications that require that accreditation.

Yes and no. Formoa Crystal does not contain any silicone-based ingredients. Instead, it is an MS polymer-based product. However, it is the same as silicone in that you can use Formoa Crystal instead of a silicone sealant. It has higher performance properties than a silicone. So if you want a cheap and cheerful product, it isn't for you.

290ml Cartridge

600ml Foil Pack