SEBS多少钱一公斤？
这个问题一搜，从十八块一公斤到四十五块一公斤，报价差得比氢化度还多。有人说我买的十八的国产通用用得挺好，有人说我买的四十五的进口高端才叫高耐候。到底差在哪？
说实话，问SEBS多少钱一公斤的人，大概率还没搞懂SEBS这东西不是一个料——通用级、高耐候级、医用级、充油级、干胶级，每个分支价格都不一样。你拿通用级的价和医用级比，那不叫比价，叫被忽悠。
SEBS就是氢化苯乙烯-丁二烯-苯乙烯嵌段共聚物，SBS的氢化产物，耐候性优于SBS，常用于医疗器械、汽车配件、胶粘剂、密封件、玩具。
一、主流牌号报价（外企+中企）
先把市面上走量的牌号和参考价摆出来。以下为近期市场参考价，实时价格以当日询价为准。
进口SEBS（外企大厂）
通用级，参考价约25-38元/公斤。汽车配件、胶粘剂、密封件。
高耐候级，参考价约30-42元/公斤。户外应用、汽车配件、建筑材料。
医用级，参考价约35-45元/公斤。医疗器械、医用耗材、食品接触。
国产SEBS（中企大厂）
通用级，参考价约18-28元/公斤。性价比高，汽车配件、胶粘剂、密封件。
高耐候级，参考价约22-35元/公斤。户外应用、汽车配件、建筑材料。
充油级，参考价约15-24元/公斤。软质制品、玩具、密封件。
一句话总结：国产充油15-24块，国产通用18-28块，国产高耐候22-35块，进口通用25-38块，进口高耐候/医用30-45块。你要的是啥氢化度和性能，决定了你该在哪一档选。
二、同是SEBS，价差凭什么这么大
SEBS的价格差，主要藏在四个地方。
第一，氢化度不同。氢化度90%左右便宜，氢化度99%以上高耐候但贵。氢化度越高，耐候性和耐热性越好，但价格越高。
第二，充油与否不同。干胶贵，充油便宜。充油级比干胶便宜20-30%，但性能略降。
第三，用途不同。通用级便宜，医用级贵。医用级需要特殊认证，价格更高。
第四，品牌和产地。进口溢价高但批次稳定，国产性价比高但牌号少。同样是高耐候级，进口比国产贵30-50%，贵的是品控和研发。
三、采购避坑：别让氢化度骗了你
我见过太多采购，比价比到最后选了最便宜的十五的充油级，然后做出来的制品耐候差、出油、客户退货，一次损失够买半年的好料。
SEBS采购这行，水比你想的深。三个坑必须绕开：
第一，看氢化度和拉伸强度不看牌号。同一个牌号不同批次性能可能波动，拿到料先测氢化度和拉伸强度，和COA对得上再用。别听销售说"差不多"，差不多就是差很多。
第二，警惕以次充好。有些贸易商拿SBS当SEBS卖，拿充油级当干胶卖。要COA、要氢化度检测、要原厂包装，三证合一才敢用。
第三，别只比单价，算综合成本。A料单价15块，做出来制品次品率5%；B料单价24块，次品率1%。算到每件制品上，B料反而更便宜。
四、标准牌号满足不了？看看改性方案
如果你发现标准牌号怎么选都差点意思——比如要高耐候又要高弹性、要高强度又要软质、要低成本又要医用级——那不是SEBS的问题，是你需要的不是标准SEBS，是改性SEBS。
这时候可以看看宁波科隆新材目前在做的高性能改性SEBS方案，增韧、增强、耐候、阻燃这些方向都有对应牌号在做。有特殊需求的可以私信要一份改性SEBS的报价参考，比自己买基料再加助剂调试，省的不只是钱，还有试错的时间。
说白了，标准料是大锅饭，改性料是定制菜。你的制品要求越高，越需要定制。
五、常用牌号，私信给你当日报价
上面的价格都是参考价，SEBS行情一天一个样，苯乙烯、丁二烯、氢气、催化剂、填充油、汇率都在动。
如果你需要进口、国产这些品牌的具体牌号当日报价，私信我，发你一份实时价格表。不绕弯子，报实数。
写在最后
买SEBS这事儿，十五的和四十五的，差的不是三十。
单价是门槛，选对氢化度和性能才是底线。别让报价单上的数字迷惑了你——你买的不是一公斤塑料，是一公斤能做出高耐候汽车配件的方案。把账算到每件制品上，再加上次品退货损失，你才知道谁真便宜谁真贵。
你在SEBS采购上踩过什么坑？是耐候差还是出油？评论区聊聊，点赞最高的三位，送一份SEBS主流牌号选型对照表。
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SEBS注塑常见问题及解决
How much is SEBS per kilogram?
SEBS is not one material: high-weatherability, medical, oil-extended, dry rubber, and each carries a different price.
1. Mainstream grade quotes (imported + domestic) — recent market references; live prices subject to same-day inquiry.
Imported SEBS
general-purpose, approx. CNY 25-38/kg. automotive parts; adhesives; seals.
high-weatherability, approx. CNY 30-42/kg. outdoor applications; automotive parts; construction materials.
medical, approx. CNY 35-45/kg. medical devices; food contact.
Domestic SEBS
general-purpose, approx. CNY 18-28/kg. automotive parts; adhesives; seals.
high-weatherability, approx. CNY 22-35/kg. outdoor applications; automotive parts; construction materials.
oil-extended, approx. CNY 15-24/kg. soft products; toys; seals.
2. Why prices differ so much
Four factors: (1) composition — lower levels are cheaper; higher levels give better performance but cost more. (2) oil extension — premium grades need special formulations and cost more. (3) application — special applications need special formulations or certification and cost more. (4) Brand and origin — imports carry a premium but offer batch stability; for the same grade, imports cost 30-50% more than domestic, paying for quality control and R&D.
3. Procurement pitfalls
The cheapest material often fails on performance and triggers customer returns. Three traps to avoid:
First, test key properties against the COA instead of trusting the grade name — performance of the same grade can fluctuate between batches. Second, watch out for substitution fraud: some traders pass off cheaper or recycled material as the real thing; demand the COA, a test report and original packaging before use. Third, don't compare unit price alone — calculate total cost per finished part, including rejected-goods loss; a higher-priced grade with a 1% defect rate is often cheaper than a low-priced one with 5% rejects.
4. Standard grades not enough? Consider modified compounds
If standard grades always fall short — for example you need flame retardancy AND high transparency, reinforcement AND chemical resistance, or low cost AND food grade — you don't need standard SEBS, you need a modified compound. Ningbo Kolong New Materials is developing high-performance modified SEBS solutions covering glass-fiber reinforcement, flame retardancy, weatherability and conductivity. Message us for a modified SEBS quote reference — it saves not only money but also trial-and-error time.
In plain terms: standard grades are a big pot of shared rice; modified compounds are a dish cooked to order. The higher your requirements, the more you need customization.
5. Popular grades — same-day quotes via message
All prices above are references; SEBS prices change daily as feedstocks and exchange rates move. If you need same-day quotes for specific grades, message us and we will send a live price sheet. No beating around the bush — real numbers.
Final words
Unit price is the threshold; choosing the right grade and performance is the baseline. Do the math per finished part, add rejected-goods loss, and you will know who is truly cheap and who is truly expensive.
What pitfalls have you hit when buying this material? The three most-liked comments will receive a grade selection guide.
