WEICON Contact VA 250 Black Cyanoacrylate Adhesive is a rubber-filled, cyanoacrylate-based industrial adhesive developed for applications that require fast fixing and added flexibility. Thanks to its ethyl-based structure, it cures with ambient moisture and is designed to form a black bond line that retains residual flexibility after curing. Its high-viscosity character makes dosing more manageable on small parts and helps reduce the risk of run-off on vertical surfaces. The manufacturer is WEICON, and the product is positioned within WEICON\u2019s Germany-based industrial product portfolio.<\/p>\n
Intended use with the VA 250 Black industrial adhesive
This industrial adhesive is positioned to deliver more stable performance in environments with changing climate conditions and long-term moisture exposure. The rubber-filled formulation helps support a more durable bond line in assemblies exposed to impact and peel forces. It can be used as a practical solution on different elastomers such as solid rubber and foam rubber, on plastics, and in metal-to-plastic joints. Since it works as a thin film, joint geometries where parts fit well provide safer and more repeatable results.<\/p>\n
Technical structure and basic performance framework
The product is defined as an ethyl-based, liquid, silicone-free industrial adhesive; after curing, it turns black. A viscosity range of 2,000\u20133,000 mPa\u00b7s provides an application profile that helps with squeeze-out control. With a maximum gap-bridging capability stated as 0.2 mm, it should not be considered a \u201cgap-filling\u201d material, but rather an adhesive that performs best on well-contacting surfaces. Heat resistance is given as -55 \u00b0C to +140 \u00b0C, and the softening temperature is stated as +150 \u00b0C; these values provide a practical framework when selecting for assemblies exposed to medium-to-higher temperature effects.<\/p>\n
Curing behavior and application window
The processing temperature range is defined as +15 \u00b0C to +40 \u00b0C, and a relative humidity band of 40%\u201370% is recommended; therefore, ambient conditions directly affect curing speed. Initial grip develops within seconds depending on the substrate, and a 24-hour curing time should be considered for final strength. Since curing can slow down significantly under very low humidity conditions, planning the process properly and using an activator when necessary become important. Because there can be a risk of \u201cshock curing\u201d under very high humidity or on certain surface chemistries, controlling substrate selection and application thickness supports repeatability.<\/p>\n
Application method, surface preparation, and sector use areas
Before application, keeping surfaces clean, dry, and free of oil is the basic requirement for achieving quality results with this industrial adhesive; mechanical roughening is recommended for very smooth surfaces. The adhesive is typically applied to only one of the surfaces, and keeping the layer thickness in the range of about 0.05\u20130.2 mm is considered critical for full curing. Parts should be joined quickly after application and fixed if possible; on larger surfaces, a spot-application approach is preferred to reduce internal stresses. Since curing may be delayed on absorbent\/porous substrates or in thicker film applications, the process can be supported with an activator; for difficult-to-bond plastics such as PE and PP, the process may require a suitable primer. Typical use scenarios include automotive supplier applications, electrical\/electronics assembly, maintenance\/repair, elastomer part manufacturing, and plastic component assembly where fast fixing and a more durable bond line are needed.<\/p>\n","protected":false},"excerpt":{"rendered":"
This product is a cyanoacrylate-based industrial adhesive used for fast fixing in rubber, plastic, and metal-to-plastic joints. It is preferred for serial bonding of small parts in automotive, electrical\/electronics assembly, and maintenance\/repair. It provides visual control with a black bond line and targets a more durable joint against impact and peel forces.<\/p>\n","protected":false},"featured_media":4151,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"product_brand":[326],"product_cat":[288,280],"product_tag":[],"class_list":["post-4098","product","type-product","status-publish","has-post-thumbnail","product_brand-weicon","product_cat-cyanoacrylate-adhesives","product_cat-one-component-adhesives","first","instock","product-type-variable","has-default-attributes"],"_links":{"self":[{"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/product\/4098","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/comments?post=4098"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/media\/4151"}],"wp:attachment":[{"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/media?parent=4098"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/product_brand?post=4098"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/product_cat?post=4098"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/utmteknik.com\/en\/wp-json\/wp\/v2\/product_tag?post=4098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}