Sealants & Joints
Vetoflex PU781

Multi-component polyurethane joint sealant
(Formerly known as Saveto PU2)

Primerless sealing pre-cast panel joints and expansion joints
As a general elastic adhesive for materials with dissimilar properties and thermal expansion coefficients
Movement and static joint sealing in various construction industry requirements.
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Technical Data Sheet
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Method Statement
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Technical Information
Product Description

Vetoflex PU781 is a multi-component, high-performance, elastomeric, chemically-curing, multi-purpose polyurethane sealant. Once cured, the product forms an elastic, joint sealant with high mechanical properties, abrasion resistance, and high extensibility to withstand long-term dynamic movement. Vetoflex PU781 is available in pouring and gun grades for ease of application as well as being available in 8 standard colors with possibility of custom colors upon request.

  • Weather resistant, suitable for External & Internal applications
  • Easy application
  • Paintable with non-solvented or water-based paints after curing in static joints (i.e. around door perimeters)
  • No crack or craze under UV exposure
  • Non-sag and non-staining
  • Does not require primer and exhibits tenacious adhesion to most building materials
  • Excellent movement accommodation
Compliance Standard
  • ASTM C920 Type M, Grade NS, Grade P, Class 25, use T, NT, A and M
  • ISO 11600, F 25 LM
  • TT-S-00227E Class A, Type I, II
Packaging & Coverage

Vetoflex PU781 - Pouring Grade stored in 4 Liter Kits
Vetoflex PU781 - Gun Grade stored in  2.5 Liter Kits

Shelf Life & Storage

Original sealed container of Vetoflex PU781 has a shelf life of 12 months provided it is stored clear of ground in a dry shaded place below 25ºC.

Application Information
Instructions for use


The use of a primer is generally not required when using Vetoflex PU781. However where hard to bond substrates such as PVC or where highly porous substrates are in question, please contact Saveto local office for assistance on suitable primer choice.


The components of Vetoflex PU781 are supplied in the correct mixing ratio. Add the entire contents of the color pack and hardener component into the base container and mix together thoroughly for three minutes using a slow speed drill (300 to 500 rpm) fitted with a suitable mixing paddle. Ensure any settlement is thoroughly dispersed.
The sides of the container should then be scraped down to ensure that any unmixed components do not remain. Mixing should then continue for a further 2 minutes.


The mixed Vetoflex PU781 can be poured directly from the mixing container by compressing the sides to form a pouring lip. Pour into the prepared joint to the required level, should the joint width prohibit direct pouring from the container, the mixed material can be poured into a Vetoflex Barrel gun and applied to the joint.
It may be necessary after a few minutes to top up the level of the sealant after it has flowed into all joint irregularities. Finally, strip of any masking tape that may have been used.
When using gun grade, follow the same application procedure while using a bulk gun, the bulk gun can be filled using a follower plate.


Vetoflex PU781 should be removed from tools, equipment and mixers with Vetonit Solvent XX400 immediately after use. Hardened material can only be removed mechanically.

Surface Preparation

Clean all joint surfaces and remove any dust, unsound material, plaster, oil, paint, grease, corrosion deposits or algae. Roughen the surfaces, remove any laitence and expose aggregate by light scabbling or grit-blasting. Oil and grease deposits should be removed by steam cleaning, detergent scrubbing or the use of a proprietary degreaser. Any expansion joint filler must be checked to ensure it is tightly packed and no gaps or voids exist at the base of the sealing slot before positioning a bond breaker. The use of a bond breaker is not required in expansion joints containing cellular polyethylene joint filler, backing rod (Vetoflex PBR). For construction or contraction joints a bond breaker tape or back-up strip must be used. Where a particularly neat finish is required, mask the face edges of the joint before sealing and remove immediately after tooling is completed.

Additional Information
Health & Safety

Vetoflex PU781 is not classified hazardous. Contains isocyanate. For information and advice on the safe handling, storage and disposal of chemical products, users shall refer to the most recent Material Safety Data Sheet containing physical, ecological, toxicological and other safety-related data.

Important note

Saveto endeavors to ensure that any advice, recommendations, information it may give, is accurate and correct. It cannot accept any liability either directly or indirectly arising from the use of its products, because it has no direct or continuous control over where or how its products are applied, whether or not in accordance with any advice, specification, recommendation or information given by us. Saveto has the right to change any of the specifications mentioned in the Technical data sheets upon its discretion without prior notification. 

Hard copies of TDSs are printed once or twice a year, while our technical data sheets are continuously being updated as per R&D improvements and new 3rd party testing; kindly refer to our website for the latest updated TDSs.


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Saudi Vetonit Co. Ltd. (SAVETO)
P.O. Box 52235 Riyadh 11563, KSA
Toll: (+966 11) 265 3334
Fax: (+966 11) 265 0936
800 124 9009
Fax: (+966 11) 265 0718
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